| Kirkby to Olympia Heights (Florida) | 4,302.38 mi (6,924.01 km) |
| Kirkby to Omaha (Nebraska) | 4,121.17 mi (6,632.38 km) |
| Kirkby to On Top of the World Designated Place (Florida) | 4,206.62 mi (6,769.91 km) |
| Kirkby to Onalaska (Wisconsin) | 3,818.71 mi (6,145.62 km) |
| Kirkby to Oneida (New York) | 3,271.03 mi (5,264.22 km) |
| Kirkby to Oneonta (New York) | 3,275.08 mi (5,270.73 km) |
| Kirkby to Ontario (California) | 5,244.00 mi (8,439.41 km) |
| Kirkby to Ontario (Oregon) | 4,658.60 mi (7,497.29 km) |
| Kirkby to Opa-locka (Florida) | 4,289.80 mi (6,903.77 km) |
| Kirkby to Opelika (Alabama) | 4,149.19 mi (6,677.48 km) |
| Kirkby to Opelousas (Louisiana) | 4,522.45 mi (7,278.18 km) |
| Kirkby to Orange (California) | 5,264.39 mi (8,472.22 km) |
| Kirkby to Orange (Texas) | 4,608.76 mi (7,417.08 km) |
| Kirkby to Orange City (Florida) | 4,174.98 mi (6,718.98 km) |
| Kirkby to Orangeburg (South Carolina) | 3,927.84 mi (6,321.24 km) |
